I found a bug!

java.lang.ClassCastException
at net.sf.hibernate.type.StringType.toString(StringType.java:47)
at net.sf.hibernate.type.NullableType.toString(NullableType.java:78)
at net.sf.hibernate.impl.Printer.toString(Printer.java:49)
at net.sf.hibernate.impl.Printer.toString(Printer.java:82)
at net.sf.hibernate.impl.SessionImpl.flushEverything(SessionImpl.java:2270)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2228)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at persistencia.impl.CompraDbAO.salvar(CompraDbAO.java:79)
at persistencia.impl.CompraDbAO.main(CompraDbAO.java:192)
Exception in thread "main"

My mapping:

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">
<hibernate-mapping>
<class name="modelo.vo.impl.CompraImpl" table="compras">
<id name="codigo" column="codigo" type="long">
<generator class="increment"/>
</id>

<property name="codForn" type="long"/>
<property name="dataCompra" type="date"/>
<property name="dataPagto" type="date"/>
<property name="dataPedido" type="date"/>
<property name="descricao" type="string"/>
<property name="finalidade" type="string"/>
<property name="frete" type="float"/>
<property name="obs" type="string"/>
<property name="total" type="float"/>
<property name="totalICMS" type="float"/>
<property name="totalIPI" type="float"/>
</class>
</hibernate-mapping>

This is unbelievable!

I doubt that very much.

Use your debugger.

I used my debugger, the exception is when cast 0(zero) value to String!

most likely you have an int property or something like that mapped as string. Check your mappings.

So, you are using an int, but tell Hibernate to use a String and you wonder about the ClassCastException? Please read the red box before posting.

I